Use a wooden or non-reactive spoon and combine the baking soda, citric acid, and Borax in a bowl. Stir them and add 20 drops of lemon essential oil. Repeat with each essential oil you want and mix well.

Next, spray the mix with about five spritzes of hydrosol and stir well. You don’t want any fizzing to happen, so continue adding hydrosol until it is just damp enough to pack into a mold. Let them sit overnight.

This video offers a slightly different recipe. Watch how they’re made — it’s so easy!